Means for controlling drainage of liquid from washing machines



July 1952 s. B. F. CARLSTEDT MEANS FOR CONTROLLING DRAINAGE OF LIQUID FROM WASHING MACHINES 2 SHEETS-SHEET 1 Filed Aug. 24, 1948 y 1952 s. B. F. CARLSTEDT MEANS FOR CONTROLLING DRAINAGE 0F LIQUID FROM WASHING MACHINES 2 SHEETS-SHEET 2 Filed Aug. 24, 1948 Patented July 22, 1952 2;604;1'06- M EKNSL FOR; CONTROLLING 6F" LIQUIDFROM'WASIHNG' IVfAGHINE'S SveniBiirje l redi ili czrlstedt; Stbfckholm; Swe'den pp i'catibx; Aeg-u tiz'e, 1948'; serialm; In Sweden April? 11,1 7 I Ir'fie invention relates to diSheWEShing macfii'nesnother 'washingtmachines; emf-the": like-211* paratuaflfiavingymean'swo circulate: a, liquid: sup' plied; to. the, machinepast a: diainifbrthe-disF cfiarge. oftlie 'liquidnffer finishing, the" work;

l l clai-msi (Cl. 134F486)? meenswin. macnines: ofthe type" setiforthwhicfi enable. the drain. to. toe-constructed: without any clbsinsflvalvesior. other mechanical valve-devices:v

Finzaherw otij'ects of the, inventibn wilrbet ap= formof. ah substantially lioriz'ont'aIl trough 'pirtf-" videciwibhacbncavefiottbmwall? 'IIi'eporfibn' l wliichlpreferably has a, sqixeire Bottom and? cV-J tangulan sideewaH's: made oflfl'iin sheet-plate. covered-by a;.1idf3 and. contains. a. Basket 4" for longl sh ape and lcafiediunder tli'e wash space "I';',

is quite open'fowards' th'e lhtt'r sp'ace. Iii'tl'fe" trough 2i a, retetabIe-nornontm biddedimpellf a5 element? has its shaft extending somewfiavbe yond? said tank: at: one" side thereof w carry: a" puIIyG', ,wfiereby' 'said" shaft" may'ne." driven" by meanswfa "belt" (not shown)?" fromiany approprf- Dlaifiagemeane-frtheapparatuses provided by- 'axsumw-l'fi which: as will 'b'eseemfrom-Figi 25* bottbmzwalfiotitheutrought between suitable end wallsgamli a; eurvediside: wall extendingnpwardiy ironrrtnw Bottom wall ofi the sump to: merge smnothl yiwithzone ofi'the' si'de walls -of the-trougmoppositeetheasump' I 8. terminates in w1'i1'a -spaced above a wall portion 12 extending;lfiteraliy -fiom 2," the better-n1 Wain: H1

laterally inte th'esumpl l 6.2

The; wallpo'rtibhs: b2: email 3 l5; V As seen from Eigisiudnaina-gee fromz'the: traumisi by gravity fiOWi tozathe'sumpr lafi andgthrougm the port: enact drain:- passage: in? ta waste: in I substantially: parallel; with 2;:- iiangent be 'thee'enr velep'emftthe impellem The impeller is reteteaete: eeemeeeeeemeeei inflame:trough in; ether direction denoted by airaw B so lthaat iti'se dischargefi unwardlwadong one'sidea ofr the con cave walliofcthestraugn;mm thewah?li' mg: spacwtb penfbrmiitshwashing;function Jamie *returnsiiromi'the wasnzing 5139168 by; gravityfoethey oppositesideofithammghe I V (-Lirculation of the: 1iquidi-imsuch ediizectionalsw caiu'ses a pamfl ofif bez-discharg ewwer'tneslipz atf-tn edge ofxwa IP31 mm sumzp I16? amfosymd awary from the pbntfi, sa thet fiuvfi'duei to suche ciireulation -opposeszthe gravityrfiuw -thmugh putts l5 to the drain assage l'fl an'dfiliqnid x'etavin:edx imtne trough-in spitezot tfie prsen'ee ofi ai fmlyopen drai'n portend: drefirfi passage". e 1

the-impeller? oven-lies: the -f axialient t-ofi the'sump resul'fisdh impingement at liquid tnrewm would be the case i the kiotfiom ofi the snmmwere curved; as aiongth'e dotted 1111 C,- 0 ii thefiiin peller binding did n0t -sweep ove ne mneemex extent' ofith'e drainipn-rt;

From the fore'gding iifi's'ibel-ieved the'coperanenvof the apparatus W111 b''" largelw obVifiuSEl p11ce=' thevmachinek ini operation, the impeller mittediito :thEtrOugh: z tmeu mneeimee a-,;1iqum bemgiereta'inedsdue"t thev cii culatbry nation; sate: up byf theaimpellerz When theiwashingi'onrinsih'gem OIJ'GT'afiOIIQ has been; completed; -.th1 fin;5e1ieifi i5 5 stoppe w and) upbm thlai resulting ce'ssationzof the: circulatory flow; the unopposed gravity; flow;

throughith'e' opem .dmim port andapassagefempigiesr th'ekmachinee 1 While one more or less speeifieiembedixnenf- "can of the: sump; to? prmri'clef 2i vertieai p'onti I SR-mcamem below the envelope; an the impeller and openings axialiy of: the: trongm enerkm 'to nmir idee a Ilatemlzl-yt extending: pnntiomofi a; draimpassagers l 0." which open eommnnicatien; withvv pane in the invention has been shown, it is to be understood that the same is for purpose of illustration only, and that the invention is not limited thereby, but its scope is to be determined by the appended claims.

What I claim is:

l. A machine of the character described having a receptacle providing an upper washing space and a communicating lower trough for liquid, the wall of said trough being formed to provide an open sump located below and extending laterally toward one side of said-trough, an impeller rotatably mounted axially in said trough, the axis of said impeller being substantially horizontal, a drain passage located below said trough and terminating in a drain port opening laterally and axially into one side of said sump below said impeller, the adjacent portion of said passage extending laterally from said porttoward the other side of said trough, the bottom wall of said sump in front of said port being substantially flat and, horizontal, and means for turning said impeller in a predetermined direction to discharge liquid across and away from said port and upwardly thereafter into said Washing space, the portion of said passage adjacent to said port extending in a direction substantially opposite that of the fiow of said discharged liquid whereby the flow of the discharged liquid opposes fiow of liquid from the receptacle through said port and said passage.

2. A machine as set forth in claim 1 in which thebottom wall of said sump curves upwardly from the substantially fiat portion to merge with the side Wall of the trough.

'3. In a machine of the character described having a receptacle for receiving articles to be washed, a substantially horizontal, trough disposed below saidreceptacle, said trough having spaced side and end walls and ,a concavely curved bottom wall, said trough being in open communication with said receptacle, a bladed impeller disposed in said trough and mounted for rotation about a substantially horizontal axis, the lower portion-of the envelope of said impeller being adjacent the inner surface of, said bottom wall, means for rotating said impeller in a predetermined direction to circulate liquid in said trough upwardly along one side wall and into said receptacle to wash said articles and downwardly from'said receptacle along the opposite side wall, drainage means for said trough and said receptacle comprising a generally rectangular sump in the bottom of said trough, said sump having spaced end walls, a bottom wall and a curved side wall, said curved side wall merging into said bottomwall and the first mentioned side wall of said trough, the major portion of said sump being disposed at one side of the vertical center line of said trough in the direction of fiow of liquid caused by the rotation of said impeller, the bottom wall of said trough terminating in a lip above the bottom wall of said sump in, overlapping relation thereto and short of the first mentioned side wall to provide a drain passage outside of but tangential to the envelope of said impeller and opening toward said curved side wall whereby upon rotation of said impeller in said predetermined direction liquid will flow over said lip and into said sump away from said. drain passage to oppose thev counter fiow of liquid from said trough into said sump and drain passage and when said impeller is at rest liquid may freely fiow into. said sump and said drain passage. V t I 4. In a machine of the character described having a receptacle for receiving articles to be washed, a substantially horizontal trough disposed below said receptacle, said trough having spaced side and end walls and a concavely curved bottom wall, said trough being in open communication with said receptacle, a bladed impeller disposed in'said trough and mounted for rotation about a substantially horizontal axis, the lower portion of the envelope of said impeller being adjacent the inner surface of said bottom wall, means for rotating said impeller in a predetermined direction to circulate liquid in said trough upwardly along one side wall and into said receptacle to wash said articles and downwardlyfrom said receptacle along the opposite side wall, drainage means for said trough and said receptacle comprising a sump in the bottom of said trough, said sump having a bottom wall and a curved side wall, said curved side wall merging into said bottom wall and the first mentioned side wall of said trough, the major portion of said sump being disposed at one side of the vertical centerv line of said trough in the direction of flfiow of liquid caused byrotation of said impeller, the bottom'wall of said trough terminating in a lip abovethe bottom wall of said sump in overlapping relation thereto and short of the first mentioned side wall to provide a drain passage tangential to the envelope of said impeller and opening toward Y said curved side wall whereby upon rotation of said impeller in said predetermined direction liquid will flow over said lip and into said sump away from said drain passage to opposethe counter flow of liquid from said trough into said sump and drain passage and when said impeller is at rest liquid may freely fiow into said sump and said drain passage. a

5. In a machine of the character described having a receptacle for receiving articles to be washed, a substantially horizontal trough' disposedbelow said receptacle, said trough having spaced side and end walls and a concavely curved bottom wall, saidrtrou gh being-in open communication with said receptacle, a bladed impeller disposed in said trough and mounted for rotation about a substantiallyhorizontal axis, the lower portion of the envelope of said impeller beingadf jacent the inner surface of said bottom wall,

means for rotating said impeller in a predetermined direction to circulate liquid in said trough upwardly along one side walland into said receptacle to wash said articles and downwardly from said receptacle along the opposite side? wall,

drainage means for said trough and said recep fiow of liquid caused by the rotation of said impeller, the bottom wall of said trough terminating in a lip above the bottom wall of said sump in overlapping relation thereto and shortof; the first mentioned side wall to provide, a drain port toward said curved sidewall whereby upon rota-i tion of said impeller in said predetermined direction liquid will fiow over said lip and into said sump and said drain port and when said impeller is at rest liquid may freely and said drain port.

flow into said sump 5"; di' lfn a machine of-the character-"described, a substantially horizontal trough for receiving liquid, said trough havingspacedside and end walls and a concavely curved bottom wall, a

bladedimpeller disposed in said trough and mounted for rotation about a substantially horizontal axis, the lower portion of the envelope of said impeller beineadiac nt th nner sur e said bottom wall, means for TQl'iaJZiIlg; said, im-v peller in a, predetermined, directionito, circulate liquid in said trough upwardly along one side wall anddownwardly along the-opposite side-wall; drainagemeans for said trough comprising a generally-rectangularsumpin the bottom of said trough, said; sump having spaced end walls; a bottom; wall and a curved side wall, said curved side wall mergingintosaid bottomwalland the first mentioned side wall of said trough, the major portion of said sump being disposed at one side of the vertical center line of said trough in the direction of flow of liquid caused by the rotation of said impeller, the bottom wall of said trough terminating in a lip above the bottom wall of said sump in overlapping relation thereto and short of the first mentioned side wall to provide a drain passage outside of but tangential to the envelope of said impeller and opening toward said curved side wall whereby upon rotation of said impeller in said predetermined direction liquid will fiow over said lip and into said sump away from said drain passage to oppose the counter flow of liquid from said trough into said sump and drain passage and when said impeller is at rest liquid may freely flow into said sump and said drain passage.

7. In a machine of the character described, a substantially horizontal trough for receiving liquid, said trough having spaced side and end walls and a concavely curved bottom Wall, a bladed impeller disposed in said trough and mounted for rotation about a substantially horizontal axis, the lower portion of the envelope of said impeller being adjacent the inner surface of said bottom wall, means for rotating said impeller in a predetermined direction to circulate liquid in said trough upwardly along one side wall and downwardly along the opposite side wall, drainage means for said trough comprising a sump in the bottom of said trough, said sump having a bottom wall and a side wall, said side wall merging into said bottom wall and the first mentioned side Wall of said trough, the major portion of said sump being disposed at one side of the vertical center line of said trough in the direction of flow of liquid caused by the rotation of said impeller, the bottom wall of said trough terminating in a lip above the bottom wall of said sump in overlapping relation thereto and short of the first mentioned side wall to provide a drain passage outside of but tangential to the envelope of said impeller and opening toward said curved side wall whereby upon rotation of said impeller in said predetermined direction liquid will flow over said lip and into said sump away from said drain passage to oppose the counter flow of liquid from said trough into said sump and drain passage and when said impeller is at rest liquid may freely flow into said sump and said drain passage.

8. In a machine of the character described, a substantially horizontal trough for receiving liquid, said trough having spaced side and end walls and a concavely curved bottom wall, a

bladed impeller disposed in said trough and mounted for rotation about a substantially horizontal axis, the lower portion of the envelop of wall and downwardly along the opposite; side.-

wall', drainagemeansfor said trough comprising; a sump in the bottom of' said trough,; said: sump: having a bottom wall and a side; wall, saidfiside: wall merg-ing intoisaid bottom: wall and, the first; mentioned sidewall of said; trough the: bottom wall ofsaidi-trough=terminating= in a lipiaboveat-he bottom wall of said: sump. in overlapping relation thereto andshort, ofa the firstimentionedsideawalk toprovideadrain port. outside of thelenvelop.of; saidimp ellenropeningz toward thexside wall: at saidi sump whereby: upon rotation v of said impeller; in; said. predetermined: direction liquid williflowl-oyerr said-lip and i'ntoisai-d sumpaway. from. said't-draim port to oppose the counter flow of liquid from said trough into said sump and drain port and when said impeller is at rest liquid may freely flow into said sump and said drain port.

9. In a machine of the character described a substantially horizontal trough for receiving liquid, said trough having a concavely curved bottom wall, a bladed impeller disposed in said trough and mounted for rotation about a substantially horizontal axis, the lower portion of the envelope of said impeller being adjacent the inner surface of said bottom wall, means for rotating said impeller in a predetermined direction to circulate liquid in said trough upwardly along one side of said bottom wall and downwardly along the opposite side, drainage means for said trough comprising a sump in the bottom of said wall, said sump having a bottom wall and end walls, the bottom wall of said trough terminating in a lip above the bottom wall of said sump short of the first mentioned side of the bottom wall of said trough to provide a substantially vertical drain port below the envelope of said impeller, said impeller being so disposed axially relative to the bottom and end walls of said sump that upon rotation of said impeller in said predetermined direction liquid will be discharged over said lip and into said sump away from said drain port to oppose the gravity flow of liquid from said trough into said sump and through said drain port.

10. In a machine of the character described a substantially horizontal trough for receiving liquid, said trough having a concavely curved bottom wall, a bladed impeller disposed in said trough and mounted for rotation about a substantially horizontal axis, the lower portion of the envelope of said impeller being adjacent the inner surface of said bottom wall, means for rotating said impeller in a predetermined direction to circulate liquid in said trough upwardly along one side of said bottom wall and downwardly along the opposite side, drainage means for said trough comprising a sump in the bottom of said wall, said sump having a bottom wall and end walls, the bottom wall of said trough terminating in a lip above the bottom wall of said sump short of the first mentioned side of the bottom wall of said trough to provide a substantially vertical drain port below the envelope of said impeller, said impeller having at least one blade disposed over said sump and extending over at least the whole axial extent of said sump whereby upon rotation of said impeller in said predetermined direction liquid will be discharged over said lip and into said sump away from said drain port to oppose the gravity flow of liquid from said trough into said sump and through said drain port.

11. A machine of the character described'hav-.

ing a receptacle providing an upper washing space and a communicating lower horizontal trough for liquid, said trough having a concavely curved bottom wall, a bladed impeller disposed in said trough and extending axially over the major portion of said trough, said impeller beingrmounted for rotation about a substantially; horizontal axis, the lower portion of the envelope of said impeller being adjacent said bottom wall, drainage means for said trough comprising a sump. located below said trough and terminating in a substantially vertical drain port opening laterally into said bottom wall below the lower por-' tion of said envelope, the axial extension of said sump being substantially less than that of saidimpellerand means for rotating said impeller-in a predetermined direction to discharge liquid acrossarid away from said port and upwardly thereafter into said washing space whereby the flow of the discharged liquid opposes the gravity flow of liquid through said port.

SVEN BC'JRJE FREDRIK CARLSTEDT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

